hey man...i think it is plain lazy either u are new to adsense or very lame.. surf the internt and see sites as many as you can to see different ad placements..the present ad placemnets wont help u at all.. browser internet ...a lot thats the key..
Your sites need some improvement in Design aspects. Design plays a main role in visitors mind. I think your are using a adsense ready template. Improve that with a professional touch.